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Hexavalent Chromium Bioremoval through Adaptation and Consortia Development from Sukinda Chromite Mine Isolates
Samuel J, Paul M.L, , Nirmala M.J, ,
Published in American Chemical Society (ACS)
Volume: 51
Issue: 9
Pages: 3740 - 3749

Indigenous isolates from the waters of chromite mining sites at Sukinda Valley, Orissa, India, showed a considerable enhancement in Cr (VI) bioreduction rate through adaptation and consortia development. On the basis of 16S-rRNA sequencing, these isolates were identified as Bacillus subtilis VITSUKMW1, Acinetobacter junii VITSUKMW2, and Escherichia coli VITSUKMW3. The native isolates showed a high tolerance at 500-1000 mg L-1 of Cr (VI). An increase in the reduction rate from 0.199-0.477 mg L-1 h-1 to 0.5-1.16 mg L-1 h-1 at 5-20 mg L -1 of initial Cr (VI) concentration was achieved by the adapted isolates. An increase in the growth rate and Cr (VI) reduction rate [0.86-2.6813 mg L-1 h-1 at 5-100 mg L-1 of initial Cr (VI) concentration] was observed in the ternary consortium of adapted isolates. The FT-IR spectra revealed the active participation of the bacterial surface groups in the reduction. The development of sequential processes (native → adapted → consortia) employing Cr (VI) tolerant isolates, proves to be a potential bioremediation strategy for specific chromite mine sites.

About the journal
JournalData powered by TypesetIndustrial & Engineering Chemistry Research
PublisherData powered by TypesetAmerican Chemical Society (ACS)
Open Access0
Authors (3)